An off-duty New Jersey police officer - and a marksman - is holed up with a reported 2,000 rounds of ammunition and multiple rifles in a home in Bucks County, Pa., where he has engaged in a firefight with police and shot the tires and video camera out of an armored SWAT vehicle.

Several police vehicles have been struck and one officer was reportedly "struck with shrapnel."

Police identified the suspect as Clifton Township Police Officer Richard Klementovich, 42, and said the standoff began after Doylestown police were called to a "neighbor dispute" at the home.

ABC station WPVI-TV in Philadelphia reported that the home belongs to Klementovich's estranged wife.

Media helicopters were cleared out of the range of the holed up gunman, and area residents have been warned to seek the safety of their basements.

Police radio reports indicate officers on scene have been advised that if there is a clear shot at the subject they are to take it.